A POJ1611

标签：severe acute respira   an atypical pneumoni   was recognized   

<span style="color:#3333ff;">/*
***************************************************
       author   :   Grant Yuan
       time     :   2014.7.24
       algorithm:   并查集

***************************************************
*/

#include<iostream>
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#define MAX 30001

using namespace std;

int par[MAX];
int high[MAX];
int n,m,k,t0,t;

void init()
{
    for(int i=0;i<n;i++)
    {
        par[i]=i;
        high[i]=0;
    }
}


int find(int x)
{
    if(par[x]==x) return x;
    else
         return par[x]=find(par[x]);

}


void unite(int x,int y)
{
    x=find(x);
    y=find(y);
    if(x==y) return;

     if(high[x]<high[y]){
        par[x]=y;
     }
     else{
        par[y]=x;
        if(high[x]==high[y]) high[x]++;
     }
}

bool same(int x,int y)
{
    return find(x)==find(y);
}

int main()
{   int f1,f2,ans;;

    while(~scanf("%d%d",&n,&m)&&m+n){
        ans=0;
        init();
        if(m==0)
             cout<<"1"<<endl;

        else{
        for(int i=0;i<m;i++)
        {
            scanf("%d%d",&k,&t0);
            for(int i=1;i<k;i++)
            {
                scanf("%d",&t);
                f1=find(t0);
                f2=find(t);
                unite(f1,f2);
            }
        }

        for(int i=0;i<n;i++)
        {
                if(find(0)==find(i))
               ans++;
        }
        cout<<ans<<endl;}
    }
    return 0;
}
</span>

A POJ1611

标签：severe acute respira   an atypical pneumoni   was recognized   

原文地址：http://blog.csdn.net/yuanchang_best/article/details/38074115